Paint and process of making same.



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JACQ ES moons, or MAAS'IRICHT, NETHERLANDS.

PAINT Ann rjaocnss or MAKING SAME.

No Drawing.

To all whom it may comic m.

7 Be it known that I, JACQUES JACOBS, subject of the Queen of the Netherlands, residing at Maastricht, Netherlands, have invented certain new and useful Improvements in Paint and Processes of Making Same, of which the following is a specification.

The present invention relates to the manufacture of a paint for protecting iron, wood metals, cement or the like.

It is known practice to use bituminous substances for protecting iron against rusting, wood against fouling or like purposes, and also to add alkaline substances, such as lime, thereto.

The results, however, never were satisfactory since the coating of the iron was not, or did not remain so complete as to prevent the corrosion by fluid or gaseous chemicals such as acids, acid vapors, salts, warm moist air or the like. Satisfactory protection was sought by making-the protecting layer very thick, but in many cases this only increased the corrosion. By means of paint made according to the pres ent invention, however, perfect protection against chemical influences such as diluted acids, acid vapors, salts, a hot moist atmosphere, sea-water or the like may be perma'- nently obtained with a very much thinner layer than formerly was used without suc cess.

A paint fit for one purpose may not be lit for another. Although a paint protects against acids, it may not protect against salts, or vice versa; although it protects against acids and salts, it may not stand the action of amoist atmosphere of changing temperature. The cause of this is that hitherto no paint remained permanently fast, and if once moisture obtains access to the iron through pores or cracks, rusting will begin and continue.

The preservative covering made by this invention, however, protects as Well against acids as salts and moreover against moist air of changing temperature, because it forms a hermetically closed coating.

The invention consists in mixing any bituminous substance or mixture of bituminous substances notcontaining water, such as asphalt, bitumen, coal tar, petroleum pitch, bituminous cement or the like, in proportions that are restricted between certain limits, with shell-lime, which has been cal- Specificationof Letters Extent.

Application filed March 7, 1916. Serial No. 82,552.

cincd at a high temperature and then exposed during a considerable period to the action of air in a covered space. By this exposure the lime is slaiked completely, or nearly completely. but very slowly and practically without rise of temperature, yielding an extremely fine powder of great covering power which to a large extent accounts for the favorable action of the preservative covering.

The technical effect is also obtained by selecting a definite proportion of the liquid mixture to the powder.

The proper proportions ofbinding material to solid substance was long sought.

Because the added solids while absorbing a part of the binding material form thehermetically closed coating, it was important to increase the proportion of the solids as much as possible'and yet to retain enough binding material to preserve to the cohesion and at the same time to forma compact,

elastic upper layer.

In the new product the larger part of the solids, saturated with a part of the binding material, separates from the rest of'the latter and the result is as if the coating of paint consisted of two cohering layers, of which one, containing most-of the solids with little binding material joins to the iron, while the other forms a compact outer layer consisting nearly wholly of binding material.

The process is worked as follows Shell-lime is calcined at a high temperature and afterward exposed for a considerable period to the action of air in a covered space. Of this material from 2 to 24: parts by weight are mixed with from 20 to 90 parts by weight of a heated bituminous binding material and with a solvent, such as toluene, benzin, solvent-naphtha, light tar-oil, an alcohol or the like. The addition of the solvent is necessary to obtain a preservative covering which may be used at ordinary temperature. The fluidity of the preservative can be adjusted at will by means of the solvent. The proportion of binding material and solid may be varied between the said limits in accordance with the nature of the material to be coated and other circumstances.

It is not known with certainty what is the cause of the valuable qualities of the mixture, but it seems that chemical as well as physical qualities cooperate to obtain the result,

As another example of these qualities, it is possible to preserve the surface of a ship, before it is launched, in adurable way and without completely removing the scales which cover the surface, this having always been the great obstacle to the painting of the surface of a ship before launching.

The preservatii e is also extremely fit for preserving all those parts of ships which are mostly exposed to corrodin influences, such as deepsea-tanksffiiifili" M toms or the like. For protecting the inside parts of double bottoms of ships, bituminous preparations are used at present of a thickness of 2030 nnn. while with the preservative above described it is suflicient to use layers of only 1--2 mm. thickness.

Having now particularly described and ascertained the nature of my said invention and in what manner the same is to be performed, I declare that what I claim is:

1. A. process for the manufacture of a .n'eservative covering, which process consists in mixing air-slaked shell-lime with a dry bituminous binding material and a solvent, substantially in the proportions described.

2. A process for the manufacture of a preservative covering, which process consists in mixing 2-24: parts by Weight of airslaked shell-lime with 20-90 parts by weight of a dry bituminous binding material and a solvent.

8. A process for the manufacture of a preservative covering, which process consists in first exposing shell-lime to air in a "doutWbotcovered space until it is slaked, and then mixing 2-2-3l parts by weight thereof with 20-90 parts by weight of a bituminous material not containing any water and with a solvent.

4. A process for the manufacture of a lu'eservative covering, which process consists in first exposing shell-lime to air in a covered space until it is nearly slaked, and then mixing 2-2 l parts by weight thereof with 20-90 pin-ts by weight of a bituminous material not containing any water and with asolvent,

5. As a. new article of manufacture, a. preservative covering composed of airslaked shell-lime, a bituminous binding 1naterial, and a solvent, substai'itially in the proportions described.

6. As a new article of manufacture, a preservative covering composed of 2-2 2 parts by weight of air-slaked shell-lime, 20-90 parts by weight of a bituminous bind ing material, and a solvent.

7.. \.s a new article of manufacture a. meservative covering composed of shelllilne nearly slaked by air, a bituminous binding material, and a solvent, substantially in the proportions described.

8. As a new article of manufacture a preservative covering composed of 2-2-l parts by weight of shell-lime, nearly slaked by air, 20-90 parts by weight of a bituminous binding-material, and a solvent.

In testimony whereof I have hereunto set my hand.

JACQUES JACOBS.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents.

Washington, D. G. 

